Is it possible to have iphone on AT&T without them knowing?

[bk120]

Is it possible to have iphone on AT&T without them knowing? What i mean is can I unlock an iphone and keep it on AT&T without having to pay for the data plan?

[Roessnakhan]

The 2G I think you can, but the 3G I'm not sure. But they'll KNOW you have an iPhone.

[Lord Sandwich]

They may not do anything to your specific account, but the WILL know simply because of your phone's IMEI number. You can pop a GoPhone SIM into an unlocked iPhone, log into AT&T online a few seconds later and see pictures of an iPhone on your account page. It's pretty eerie.

[k2dragon]

tmobile does the same thing. What ever phone your SIM goes in, they know.
ps: tmobile doesnt have a pic of an iPhone. would be nice tho :p

[aspenboy]

no, I have an unlocked iPhone on AT&T using their prepaid Pay as you Go (GoPhone) plan and once I had called and they said that they knew I had an iPhone and that I wasn't on an official iPhone plan but that she wouldn't do anything about it.